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x-7=0 x-2=0
x1=7 x2=2
x² -7x -2x +14 = 0
(x² -7x) -(2x -14) = 0
x(x -7) -2(x -7) = 0
(x -2) (x -7) = 0
x -2 = 0
x = 2
x -7 = 0
x = 7
Jadi, himpunan penyelesaiannya adalah {2,7}.
Itu jawabannya.